This paper presents a solid freeform fabrication (SFF) technique based on micro-plasma powder deposition (MPPD). The relationship between the geometric features of the deposited layers and the welding parameters is investigated. The arc length is controlled through the monitoring of the arc voltage. The result of building parts with functionally graded components by the MPPD process is shown as...

When powder injection molding first appeared on the market, it was very well received for the potential it offered. However, the market did not grow as expected at that time. In recent years, the perseverance of manufacturers in this field has borne fruit, and today, the market is about 10 billion yen. However, looking at the market, one is still painfully aware of how low its recognition remai...

This paper provides an overview on our recent investigations on the consolidation of hierarchy-structured nanopowder agglomerates and related applications to net-shaping nanopowder materials. Understanding the nanopowder agglomerate sintering (NAS) process is essential to processing of net-shaped nanopowder materials and components with small and complex shape. The key concept of the NAS proces...

This paper presents local solidification of metal powder, irradiated by localized microwaves, as potential means for stepwise additive formation of 3D structures. Experimental results of metal powder solidified locally by microwaves are presented in forms of spheres and rods in a 1-10 mm range. The feasibility of extending solid structures by adding powder batches and solidifying them locally, ...

Exposure to starch powder from both surgical and examination gloves can cause a number of undesirable reactions, which vary from well known allergy symptoms and upper respiratory-tract disorders to pleuritis, myocarditis, irritation of the central nervous system or even carcinoma or tuberculosis misdiagnosis. A well documented consequence of the use of starch powder in gloves is its capacity to...

The present study applied the microscopic powder identification technique to determining the adulterated seasoning powders from several plant origins, such as chili, pepper, cumin and mustard. The microscope observation results showed that the chili powder were adulterated with the fragments of plant straws, foliage and other substances; the pepper powder were adulterated with starch, straws an...

Methods to improve osseointegration that include implantation of rhBMP-2 with various kinds of carriers are currently of considerable interest. The present study was conducted to evaluate if the rhBMP-2 loaded β-TCP microsphere-hyaluronic acid-based powder-like hydrogel composite (powder gel) can act as an effective rhBMP-2 carrier for implantation in host bone with a bone defect or poor bone q...